How to create a super fine wireframe with low poly?
You could try something like this - material only, no geometry.

All it is really, is a mix of two separate Wave Textures (on different axes), clamped by ColorRamps to make sharper &quot;ridges&quot;. I softened the effects of the procedural textures (noise and wave) in a few places using MixRGB nodes, mixed with white, and I ran the (multiplied) result of the 2 Wave textures through a Bump Node and into the Normal input of the Principled BSDF.
I slightly warped the input vector using a Noise Texture so the result isn't so &quot;gridlike&quot;, and I mixed a bit of Ambient Occlusion shadow effect to make the ridges &quot;pop&quot; even more.